[4] Voskar also participated in the victory on Čelopek near Kumanovo on 16 April 1905, part of the četa (unit) of vojvoda Savatije Milošević.
After the outbreak of World War I, when Jovan Babunski formed the Sava Chetnik detachment, which was then placed under the command of Major Vojislav Tankosić, Voskar's unit went on to fight the Austro-Hungarians in the late summer of 1914 and later destroyed a railway bridge on the Sava River to prevent Austro-Hungarian forces from crossing it.
This allowed the Serbian army and civilians to reach Corfu and eventually Salonika, where they met up with expeditionary forces from several countries, including France, Italy, Great Britain, Russia, and Greece, the so-called Allied Army of the Orient.
[5] Hadžić took several volunteers with him, among them Vlada Voskar, an experienced Chetnik, before leaving for Odessa, they made a stop-over in Iaşi where Voskar joined up with Lieutenant-Colonel Aleksandar Srb,[6] Magarašević,[7][8] and Pavković[9] who become prominent commanders in the ranks of the First Serbian Volunteer Division and later in the White movement.
[10] Voskar went on to fight in Chita, Zabaykalsky Krai, Krasnoyarsk, Tyumen, Tobolsk Kremlin, Novi Nikolaevsk (Novosibirsk) and Vladivostok.